This is easy to avoid since a reputable ICO would of course demand the approacher to do the video first, before payment. That would just be common sense.
Yes, it do just need common sense but you wont believe ive seen theres still some teams who believe with those scammers. Sounds dumb right? but its happening.I dont know whats their agreement but it turns out the way of scamming is effective.Team might be in a hurry when it comes to marketing their sale which they are already doing careless moves without taking into consideration the risk on being scammed due to such desperation.